Remove using isdigit since its deprecated

I had put an extra check to see if instance number is a digit
and used POSIX::isdigit for that. However, it's deprecated in
the PERL version that is in the mrw-tools.

Also, no other parsers are doing this explicit check since
the instance number has to be digit and is fundamental and
hence isdigit check is not needed.

Change-Id: I5922e466af6cdd9e9365c1d9ddf54b12a6763a5c
Signed-off-by: Vishwanatha Subbanna <vishwa@linux.vnet.ibm.com>
1 file changed